SpillReaderStreamState

datafusion_physical_plan::spill

Enum SpillReaderStreamState 

Source 
enum SpillReaderStreamState {
    Uninitialized(RefCountedTempFile),
    ReadInProgress(SpawnedTask<Result<(StreamReader<BufReader<File>>, Option<RecordBatch>)>>),
    Waiting(StreamReader<BufReader<File>>),
    Done,
}

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Uninitialized(RefCountedTempFile)

Initial state: the stream was not initialized yet and the file was not opened

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ReadInProgress(SpawnedTask<Result<(StreamReader<BufReader<File>>, Option<RecordBatch>)>>)

A read is in progress in a spawned blocking task for which we hold the handle.

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Waiting(StreamReader<BufReader<File>>)

A read has finished and we wait for being polled again in order to start reading the next batch.

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Done

The stream has finished, successfully or not.

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